Process for recovery of ingredients of oily ink.



V M. s. HOPKINS L c.. R. BARNETT. V PROCESS FOR RECOVERY 0F INGREDIENTS 0F OILY INK.

APPLIOATION FILED JULY 25. 190B.

M. S. HOPKINS & C. R. BARNET'I'. PROCESS FOR REGOITERY OP INGREDIENTS 0F OILY INK.

APPLIGATION FILED JULY 25, 1908.

Patented Aug. 31, 1909.

2 SHEETS-SHEET 2.

W/YYVESSES Allarney UNITED sTATEs PATENT. oEEIoE.

xA'r'rHEw s. norms cmLEs ameELY BARNETT, oF ROLAND PARK, MARYLAND.

PROCESS FOR RECOVERY OF INGREDIENTS OF OILY INK.

Specification of Iieers Patent.

Patented Aug. 31,1909.

`Applitiation filed July 25, 1908. Serial N0. 446,375.

able others skilled in the art `to whichit ap` pertains to make and use the same.

This invention relates to the recovery of the component ingredients of oily ink, such, for example, as that contained in the cloths used for wiping engraving plates,the object of the invention being toso treat the ,liqf

nor resulting fronrtho washing of the inkladened cloths, that the volatile solvent employed'in the washing can be readily and economically recovered; so that the pigment can be mechanically separated from the liquor, and1 so that the oil can be separately recovere Y With this object in view, the invention consists in certain steps in the process for the purpose stated, as hereinafter set forth and pointed out in the claims. y

In the accompanying drawings; Figure 1 is a view of one form of apparatus with the use of which, our improved process can be carried into effect; Fig. 2 is a sectional view of the washing machine; Fig. 3 isa sectional view of the condenser. Fig. 4 is a sectional view of the still, and Fig. 5is a fragmentary sectional view of the filter press.

For the purpose of removing ink from cloths used for wiping engraving plates, it has heretofore been proposed` to Wash the cloths in a solvent, such as naphtha, so that the resulting liquor will consist of naphtha carrying in solution or suspension, the pigment and oil of which the ink was composed. The constituents of this liquor are valuable when properly separated and recovered, but heretofore, diiliculty has been experienced in filtering the pigment from the oil, and as the latter is the most valuablel ingredient ofthe liquor, it is highly desirable to effectually separateall of the pigment therefrom. Ex-

drum 5 to contain .the cloths.

tion of Ithe machine is provided..with a door perience has demonstrated that if the liquor be passed (without previous chemical treat'- ment) through a filter press, the latter will fail to effectually separate the pigment from the oil, and ,it is therefore important to so treat the liquor as to destroy the viscous quality of the oil and form a precipitate capable of carrying down the pigment, which can then be fully separated from the oil and solvent with the use of a filter press.

In carrying our invention into effect, we place the cloths or other material containing ink or other oily pigment, in a washing-machine 1, and agitato them in the presence ot' a suitable solvent, such for example, as benzin, ethers, esters, carbon tetrachlorid, chloroform, carbon bi-suld, naphtha, turpentino or other oil solvent.

The washing machine may consist of a body portion having a steam jacket 2 with which steam inlet and exhaust pipes 3 4 communicate, and an. open-work revoluble The body por- 6 and' the drum is similarly provided with a door 7. One journal of the drum 5 may be provided with a pulley 8 to which motion is transmitted by a belt 9 from a pulley 10 on a line shaft 11.

After the cloths have been treated for ten minutes (more or less) with benzin or other solvent in the Washing machine, the resulting liquor will be discharged through a pipe 12 (having a controlling valve 13) to a tank or vat-14. A pipe 15 also communicatesat one end with the Washing machine and at the other end with a pumpl, the latter communicating by a pi e 17 with a solvent storage tank.18. A va ve 191s provided 1n the pipe 17 and a similar valve 2.0 is provided in the pipe 15 for controlling the passage of solvent to the washing machine- After the cloths have been treated and the liquor (consisting of solvent, pigment .and oil) has been run into the tank 14 as above described, the valve 13 will be. closed and the'valves 19-20 opened. The pump 16 will now be operated to force more sol- ,vent into the Washing machine for the further treatment of the cloths; after which the liquor will be run into the tank 14 as before. rl`his operation may be repeated several times if necessary.

The interior of the lWashing machine is Vconnected, by a pipe 21, (having a valve 22),. with a pipe 23 which communicates with a condenser 24, and the latter com- 'municates through the medium of a pipe 26 with a vacuum pump as hereinafter more fully explained. The vacuum pump may be driven by belt gearing from the line shaft 11. When the .cloths have' been treated with volatile solvent in the Washing machine as before explained, heat afforded by the lsteain jacket of the machine will serve to volat1lize' any solvent remaining vin the cloths,

and by opening the valve 22, these vapors will be drawn through vthe pipe 21 by the operation-,of the vacuum pump, and

' will be condensed in their passage through vmedium of suitable gearing the condenser '24, the resulting. condensed solvent finally reaching the storage'tank 18, in a manner JWhich will be explained farther on. The cloths may nowV be removed from the. washing machine,y and subjected to a Washing in Waterl if desired.

An` agitator 27 is located Within the tank 14 and vthe shaft of this agitator may be driven from the line shaft 1-1, through the 29 of the tank'14 may rest loosely thereon A ing agitation,

* earth, carbqn, `perci capable of entering holie or etherial so We have found that an alcoholic solution of calcium c lilorid, or lead acetatewill serve eflciently for the reagent first introduced into 'the tank 14 with the liquor, and that the substance subsequently introduced during agitation of the material andwhich will cause aprecipitate containing the pi 1n -the liquor that can be mechanica tered or separated from the liquor an sol.-

ent

vent, may be achemical] equivalent amount of a solution of sulfuric acid and alcohol.

f The liquor contained in the tank 14 will be thoroughly agitated with the reagents above referred to until the precipitate is such" as can be filtered through lan ordinary filter ress, or'which can beseparatedifrom the uid by any other mechanical means.

The failure of liquorl to properly filter to remove the pigment, Without being first 28. TheA cover treated as above described, is believed to be due, not so 'much to the nature of the pig- `ment as it is to the viscous character of the carrier, and we have discovered that with the use of materials such as ethers, esters, solvent naphtha, alcoholic solutions of soa etc., suoli viscous property 'ofthe-liquor is destroyed and thus mechanical separation of the carrier and pigment is rendered possible.

The tank 14 is connected by means of a pipe 32 having a valve 33, with a' pump 34 and the latter is connected by a pipe 35 having a valve 36 with a filter press 37. The plates of this filter press are provided with chambers 38 through which steam (from a steam supply pipe 39) is circulated for heating the press. A pipe 40 connects the filter press with a tank 41, and with this pipe, one

Vend of a pipe '42icommunicates,-the other end of the pipe 42 being connected with the pipe 23 and, through the latter, with thev condenser and vacuum pump. The pipe 40 is provided with a valvel 43and in the pipe 42, a valve 44 is located.A

Then the liquor in the tank 14 has been treated as before explained the valves 35 and 36,\vill be opened and the pump 34 operated to cause the iquor containing the precipitate to flow to and through the filter press. The now insoluble precipitate consisting very largelyof pigment 'will be arrested by the filter press, While the fluid will leave the flter'pres's by the pipe. 40 (the valve 43 being open and the valve 44 closed) and enter the tank 41. The valves 36 and 43 will now be closed and valve 44 opened. Steam will be permitted to circulate through the filter plates and suppl heat Which Will volatilize any solvent whic may remain with the precipitate in the filter press. The vacuum pump 25 will be operated, and the volatilized solvent will be drawn from the filter, through the pipe 40 and, vafter being .condensed by passage through the condenser, will find its way into the storage tank 18. Thus the precipitate will be dried in the ilter press and any solvent which may have remained with it will be recovered'. The solution containing the heavy oil now in the tank 41, will be dischargedthrough a pipe 45 (having a valve 46) into a still 47. This kstill is made with a steam jacket 48 with which steam pi s 45)*50 communicate, and said still may a so be provided with a steam coil 51 for supplying heat to drive olf tlie volatile solvent contained in the fluid, and leave the only remaining` ingredient of the Huid,heavy oil,-in the bottom of the still, from which it can be withdrawn through a valved discharge pipe 52.

The vaporized solvent will escape `from the still through the pipe 23 to the condenser 24, and such passage of the vapor from the still will be augmented by the action of the vacuum pump.25. VViththe use of the vacuum pump to withdraw the vaporized solvent from the still, less heat will be required to vaporize the solvent and hence the oil which remains in' the still will not be unduly darkened, as might be the case if more excessive heat were employed and the ilse of the vacuum pump omitted.

The condenser 21 comprises a shell having a water jacket 53 with which circulation pipes l-- communicate. The condenser also contains a drinn 5G having its lower end open and its upper end 57 closed a short distance below the lower end of the inlet pipe Q3. A water cooling coil 5S may be located in the coiidenseraround the drum 56 and with the ends of this coil, pipes 59-60 communicate. The pipe 2G projects upwardly through the bottom of the shell of the condenser and communicates with a pipe section (Si projecting upwardly within the drum 56 and terminating near .the upper closed end of the latter. Any uncondensed vapors in the condenser Q4 (which has been found to be approximately one per cent.) will find exit through the pipes (S1-Q6 to the vacuum pump, andA will exhaust from the latter, through a pipe 62, to a second condenser 08. The construction of the condenser (33 may be the saine as that of the condenser 2l, and may, if desired, be provided with a safety vulve (Hf. 'llie lower end of the condenser (S2-l communicates with the storage tank 18, through the medium of a pipe ($5 having a valve (SG. y

The major portion of the condensation of vaporized solvent will occur in the condenser 21, but as this condenser is in the circuit of the vacuum pump, the condensed solvent will not flow by gravity from the bottom of said condenser 24;. In order, therefore, to remove the condensed solvent from the condenser 24 to the solvent storage tank 18, a pump 67 is employed. The bottom of the condenser 24 is connected, by a valved pipe 68 withthe pump 67, and the latter is connected, by a pipe 69 with the solvent storage tank 18.

We do not in this application, claim broadly the rocess for the recovery of oil, pigment andp solvent separately, independently of the action of a vacuum pump, such process being described and claimed in our application for patent filed July 21, 1908, Serial No. 444,617.

Having fully described our rinvention,

what we claim as new and desire to secure by Letters-Patent, is

1. The process of removing oily qpigment from material containing the same, and recovering the ingredients of said oily 'pigment and the solvent employed, consisting in subjecting said material to the action of an oil solvent in a closed chamber, treating the resultant liquor to form a precipitate containing the pigment, separating the pigment from theliquor, separating the solvent from the oil and recovering the latter, and sub-` jecting the said closed chamber to the action of a vacuumpump to Withdraw vaporized solvent therefrom.`

The herein described process consisting in inclosing cloths containing oily pigment in a closed chamber with a volatile solvent to remove the oily lpigment from tlievcloths, treating the resultant liquor tol recover the solvent, the pigment, and the oil separately, and subjecting the closed chamber to the action of a vacuum pump to withdraw volatile solvent therefrom.

3. The herein described process consisting in inclosing cloths containingoily pigment in a closed chamber with a volatile solvent to remove the oily pigment from the cloths, treating the resultant liquor to recover the solvent, the pigment and the oil separately, heating the closed chamber, and simultaneously subjecting the closed chamber to the 'action of a vacuum pump-to withdraw volatilized solvent therefrom.

' 4. r[he herein described process, consisting in treating material containing oily pigment with a volatile solvent, treating the resulting liquor chemically to form a precipitate containing the pigment, then passing the liquor through a filter press, heating the filter press to vaporize solvent remaining with the precipitate collected by the vfilter press, subjecting said filter press to the action of a vacuum pump to remove said vaporized solvent, and condensing said vapor-ized solvent.

5. The herein described process consisting in treating material containing oily pigment with a volatile solvent, removing the pigment from the resultant liquor, passing the remaining fluid through a still to separate the solvent from the oil, simultaneously subjecting said still to the action of a vacuum pump to remove the vaporized solvent, and condensing the vaporized solvent.

6. The herein described process, consist-ing in treating material containing oily pigment, with a volatile solvent, chemically treating the resulting liquor to form a precipitate containing the pigment, passing the liquor through a filter press toremove the precipitate containing the pigment, passing the liquor through a still to remove the volatile solvent and recover the oil, passing the vaporized solvent through a condenser, simultaneously subjecting the still and condenser to the action of a vacuum pump, and recovering the condensed volatile solvent. 7. The herein described process, consisting in subjecting material containing oily pigment to the action of a volatile solvent to remove the oily pigment, treating the resultant liquor chemically to form a precipitate containing pigment, mechanically separating the igiiient from the liquor, then subjecting t 1e liquor simultaneously to the action of heat and a vacuum pump to remove pump to withdraw the vaporized solvent the volatile solvent from the 011, and confrom said still. densing the volatilized solvent. In testimony whereof, we have signed this 8. The herein described process consisting Specification in the presence of two subscrib- 15 5 in treating material containing oily pigment ing Witnesses.

With a volatile solvent to remove the oily I MATTHEW-S. HOPKINS. pigment from said materlal, separating the i plgment from theresultant liquor, treating CHARLES RIDGEIY BARNETT l the liquor in a still tovaporize the solvent Witnesses: 10 and recover the 011, and simultaneously sub- LEWIS N. HOPKINS, Jr.,

jecting the still to the 4action of a vacuum JOSEPH T. BYRNE. 

